package com.ruoyi.framework.ws;

import com.alibaba.fastjson2.JSONArray;
import com.alibaba.fastjson2.JSONObject;
import com.ruoyi.common.core.domain.entity.SysUser;
import com.ruoyi.system.domain.AiChat;
import com.ruoyi.system.service.AiChatService;
import com.ruoyi.system.service.ISysUserService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
import org.springframework.web.reactive.function.client.WebClient;

import javax.websocket.*;
import javax.websocket.server.PathParam;
import javax.websocket.server.ServerEndpoint;
import java.io.IOException;
import java.util.Date;
import java.util.concurrent.CopyOnWriteArraySet;
// @ServerEndpoint 声明并创建了webSocket端点, 并且指明了请求路径
// id 为客户端请求时携带的参数, 用于服务端区分客户端使用
@ServerEndpoint("/ws/{sid}")
@Component
public class WebSocketServer {

    private static AiChatService aiChatService;


    private static  ISysUserService iSysUserService;

    @Autowired
    public void setAiChatService(AiChatService aiChatService) {
        WebSocketServer.aiChatService = aiChatService;
    }

    @Autowired
    public void setISysUserService(ISysUserService iSysUserService) {
        WebSocketServer.iSysUserService = iSysUserService;
    }


    private static WebClient deepseekClient;
    private static String deepseekModel;
    private static Double temperature;
    private static String apiUrl;

    @Autowired
    public void setDeepseekClient(WebClient deepseekClient) {
        WebSocketServer.deepseekClient = deepseekClient;
    }




    @Autowired
    public void setDeepseekConfig(
            @Value("${deepseek.api.url}") String apiUrl,
            @Value("${deepseek.api.model}") String model,
            @Value("${deepseek.api.temperature}") Double temperature
    ) {
        WebSocketServer.deepseekModel = model;
        WebSocketServer.temperature = temperature;
        WebSocketServer.apiUrl = apiUrl;
    }




    // 日志对象
    private static final Logger log = LoggerFactory.getLogger(WebSocketServer.class);

    // 静态变量，用来记录当前在线连接数。应该把它设计成线程安全的。
    private static int onlineCount = 0;

    // concurrent包的线程安全Set，用来存放每个客户端对应的MyWebSocket对象。
    private static CopyOnWriteArraySet<WebSocketServer> webSocketSet = new CopyOnWriteArraySet<>();

    // 与某个客户端的连接会话，需要通过它来给客户端发送数据
    private Session session;

    // 接收sid
    private String sid = "";

    /*
     * 客户端创建连接时触发
     * */
    @OnOpen
    public void onOpen(Session session, @PathParam("sid") String sid) {
        this.session = session;
        webSocketSet.add(this); // 加入set中
        addOnlineCount(); // 在线数加1
        log.info("有新窗口开始监听:" + sid + ", 当前在线人数为" + getOnlineCount());
        this.sid = sid;
        try {
            sendMessage("连接成功");
        } catch (IOException e) {
            log.error("websocket IO异常");
        }
    }

    /**
     * 客户端连接关闭时触发
     **/
    @OnClose
    public void onClose() {
        webSocketSet.remove(this); // 从set中删除
        subOnlineCount(); // 在线数减1
        log.info("有一连接关闭！当前在线人数为" + getOnlineCount());
    }

    /**
     * 接收到客户端消息时触发
     */
    @OnMessage
    public void onMessage(String messageStr, Session session) throws IOException {
//        log.info("收到来自窗口" + sid + "的信息:" + messageStr);

        JSONObject message = JSONObject.parseObject(messageStr);

        // 群发消息
        for (WebSocketServer item : webSocketSet) {
            if (item.sid.equals(sid)) {
                this.sendUserMessage(message.getString("content"));//加user_message
                AiChat chat = new AiChat();
                SysUser sysUser = iSysUserService.selectUserByUserName(sid);
                chat.setUserId(sysUser.getUserId());
                chat.setUserChat(message.getString("content"));
                chat.setChatDate(new Date());
                // 保存到数据库
                iSysUserService.insertAiChat(chat);
                long id=chat.getId();
                //调起deepseek
                callDeepSeekAPI(message.getString("content"), id); // 改为异步处理
            }
        }
    }

    /**
     * 连接发生异常时候触发
     */
    @OnError
    public void onError(Session session, Throwable error) {
        log.error("发生错误");
        error.printStackTrace();
    }

    /**
     * 实现服务器主动推送(向浏览器发消息)
     */
    public void sendMessage(String message) throws IOException {
//        log.info("服务器消息推送：" + message);
        JSONObject aiMessage = new JSONObject();
        aiMessage.put("type", "ai_response");
        aiMessage.put("content", message);
        aiMessage.put("timestamp", System.currentTimeMillis());
        this.session.getBasicRemote().sendText(aiMessage.toJSONString());
    }




    /**
     * 实现服务器主动推送(向浏览器发消息)user用
     */
    public void sendUserMessage(String message) throws IOException {
//        log.info("服务器消息推送：" + message);
        JSONObject aiMessage = new JSONObject();
        aiMessage.put("type", "user_message");
        aiMessage.put("content", message);
        aiMessage.put("timestamp", System.currentTimeMillis());
        this.session.getBasicRemote().sendText(aiMessage.toJSONString());
    }

    /**
     * 发送消息到所有客户端
     * 指定sid则向指定客户端发消息
     * 不指定sid则向所有客户端发送消息
     * */
    public static void sendInfo(String message, @PathParam("sid") String sid) throws IOException {
//        log.info("推送消息到窗口" + sid + "，推送内容:" + message);
        for (WebSocketServer item : webSocketSet) {
            try {
                // 这里可以设定只推送给这个sid的，为null则全部推送
                if (sid == null) {
                    item.sendMessage(message);
                } else if (item.sid.equals(sid)) {
                    item.sendMessage(message);
                }
            } catch (IOException e) {
                continue;
            }
        }
    }

    public static synchronized int getOnlineCount() {
        return onlineCount;
    }

    public static synchronized void addOnlineCount() {
        WebSocketServer.onlineCount++;
    }

    public static synchronized void subOnlineCount() {
        WebSocketServer.onlineCount--;
    }

    public static CopyOnWriteArraySet<WebSocketServer> getWebSocketSet() {
        return webSocketSet;
    }



    private String callDeepSeekAPI(String userMessage, long id) {

        //补充上下文
        String userMessage_b="你现在扮演一位医生，请专业的回答我:"+userMessage;
        userMessage=userMessage_b;
        JSONObject requestBody = new JSONObject();
        requestBody.put("model", deepseekModel);
        requestBody.put("temperature", temperature);
        JSONArray messages = new JSONArray();
        JSONObject jsonObject=new JSONObject();
        jsonObject.put("content", userMessage);
        jsonObject.put("role", "user");
        messages.add(jsonObject);

        requestBody.put("messages", messages);
        return deepseekClient.post()
                .uri(apiUrl)
                .bodyValue(requestBody.toString())
                .retrieve()
                .bodyToMono(String.class)
                .subscribe(response -> {
                    String aiResponse = parseResponse(response);
                    // 构造聊天记录对象
                    saveAiResponse(id, aiResponse);
                    // 直接使用当前实例发送
                    try {
                        this.sendMessage(aiResponse);
                    } catch (IOException e) {
                        throw new RuntimeException(e);
                    }
                }).toString();
    }




    private String parseResponse(String response) {
        try {
            JSONObject json = JSONObject.parseObject(response);
            return json.getJSONArray("choices")
                    .getJSONObject(0)
                    .getJSONObject("message")
                    .getString("content");
        } catch (Exception e) {
            return "解析响应失败：" + e.getMessage();
        }
    }



    private void saveAiResponse(Long chatId, String response) {
        System.out.println(chatId);
        AiChat aiChat = new AiChat();
        aiChat.setId(chatId);
        aiChat.setAiChat(response);
        iSysUserService.updateAiChat(aiChat);
    }


}
